Many possibilities- you could start by pulling codes, also described in detail and no tools needed.
Engine Stumble
Thread Starter
Heel & Toe
Joined: Dec 2011
Posts: 17
Likes: 0
Engine Stumble
I have a 94 Vette Convertable with a stock LT1. Has too many miles, 185K but runs, handles and looks great. recently, its been doing a stumble and has no pattern that I can tell other than it will stumble weather the engine is hot or cold, excellerating, idling at a traffic light or just crusing at 2000rpm. Its like I shut the key off. Also, at times, it may be hard to start, like there is no spark. if it does this i might hold the pettle to the floor and crank...weather this makes a diff, I dont know. onc e it does start it may run a little rough but clears up before I roll out. (maybe holding the throttle hold down makes it rich for a minute). Can anyone help me with this new symptom? Otherwise it runs great, good mileage, and uses no oil. Thanks!
Drifting
Joined: Jun 2010
Posts: 1,853
Likes: 8
From: Westerly RI
Thread Starter
Heel & Toe
Joined: Dec 2011
Posts: 17
Likes: 0
Cliff, you said anything over 70% will shut off the injecters. when i do that and it starts, its rough and missing then it will begin to clear up. i did that last night to see if i could see and leaking sparks, found none. could there be loose or dirty grounds that is causing a shut down of the engine. its more than just a stumble. if i'm running down the road at any rpm its like the engine shuts off...but comes back on. like a hard stumble. if it does that while im sitting at a light engine will die. hot cold, no matter...
Thread Starter
Heel & Toe
Joined: Dec 2011
Posts: 17
Likes: 0
also, has anyone heard of this...probably not related to engine stumble. if i hit a bump my courtesy lights flash and the drivers door lock will unlock. this is just wierd... doesnt happen with every bump.
Drifting
Joined: Jun 2010
Posts: 1,853
Likes: 8
From: Westerly RI
You likely have a loose connector or broken wire in the driver's door. Or the door jamb switch is loose.
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